Merge pull request #28902 from Artur-

* gh-28902:
  Make ErrorPageSecurityFilter compatible with Servlet 3.1

Closes gh-28902

spring-boot-project/spring-boot/src/main/java/org/springframework/boot/web/servlet/filter/ErrorPageSecurityFilter.java

@@ -21,6 +21,7 @@
 import javax.servlet.DispatcherType;
 import javax.servlet.Filter;
 import javax.servlet.FilterChain;
+import javax.servlet.FilterConfig;
 import javax.servlet.RequestDispatcher;
 import javax.servlet.ServletException;
 import javax.servlet.ServletRequest;
@@ -54,6 +55,11 @@ public ErrorPageSecurityFilter(ApplicationContext context) {
 		this.context = context;
 	}
 
+	@Override
+	public void init(FilterConfig filterConfig) throws ServletException {
+		// Intentionally blank
+	}
+
 	@Override
 	public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain)
 			throws IOException, ServletException {